input: implement wl_seat version 9

wire/jay_seat_events.txt

@@ -60,3 +60,8 @@ msg modifiers = 10 {
     modifiers: u32,
     group: u32,
 }
+
+msg axis_inverted = 11 {
+    inverted: u32,
+    axis: u32,
+}

wire/wl_pointer.txt

@@ -66,3 +66,8 @@ msg axis_value120 = 9 {
     axis: u32,
     value120: i32,
 }
+
+msg axis_relative_direction = 10 {
+    axis: u32,
+    direction: u32,
+}